//: holding/Statistics.java
package com.dozy.learn.holding;

// Simple demonstration of HashMap.
import java.util.*;

public class Statistics {
    public static void main(String[] args) {
        Random rand = new Random(47);
        Map<Integer, Integer> m = new HashMap<Integer, Integer>();
        for (int i = 0; i < 10000; i++) {
            // Produce a number between 0 and 20:
            int r = rand.nextInt(20);
            Integer freq = m.get(r);
            m.put(r, freq == null ? 1 : freq + 1);
        }
        System.out.println(m);
    }
} /*
   * Output: {15=497, 4=481, 19=464, 8=468, 11=531, 16=533, 18=478, 3=508,
   * 7=471, 12=521, 17=509, 2=489, 13=506, 9=549, 6=519, 1=502, 14=477, 10=513,
   * 5=503, 0=481}
   */// :~
